Improvement in slate-frames



UNITED STATES PATENT OFFICE.

JOHN HAGGERTY, OF CORRY, PENNSYLVANIA, ASSIGNOR OF ONE-HALF HI RIGHT TOV. Gr. CURTIS, OF SAME PLACE.

IMPROVEMENT IN SLATE-FRAMES.

Specilication forming part of Letters Patent No. 166,523, dated August10, 1875 application tiled May 26, 1875.

I slates 3 and it consists in covering the frame of the slate with felt,or other suitable material, which covering has a bead formed all the wayaround the frame, so as to completely deaden the sound made by the slatein coming in contact with the desk or other objects.

Figure lis a side elevation of my invention. Fig. 2 is a detail view ofthe same, showing different-shaped beads.

a represents a common school-slate, the frame of which is covered With'ajacket of felt, c, which jacket or covering is provided with a bead, e,of the same material, and of any desired shape or thickness. Where theframe is simply covered with felt or rubber this covering serves to aconsiderable extent to deaden the noise made by the striking of theslate against benches and other hard objects,but does not entirelyobviate the great noise that is always made in a school-room. By makingthis bead as a part of the covering, the covering is made sufficientlythick to entirely deaden all noise Without making the covering so thickas to be clumsy and bungling.

Having thus described my invention, I claim rIlhe slate-frame having acovering, C, of felt or similar material, provided with a bead, e,substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this1st day of May, 1875. A

JOHN HAGGERTY.

Witnesses:

S. A. HoLLIsTER, H. O. LINscoTT.

